Hi:If your crowns are stained due to drinking tea, coffee or smoking, then Oral Essentials Whitening strips can help. However, if you don’t like the color of your crowns, then they have to be replaced with a new one.Best,Dr. Maddahi
Kitty, thank you for your great question. The best procedure I know of to whiten crowns is to change them. In case crowns were done recently and there is nothing wrong with them except esthetically, a second option is to place Lumineers/veners over them. That's ok in some caes.